Which martial arts are both internal and external at the same time?

Which martial arts are both internal and external at the same time?
Most traditional martial arts include an emotional and a physical change. They teach self-discipline and respect, which I imagine you are referring to as 'internal'. All martial arts offer a physical development of skills, understanding and ability.
Basically all martial arts have an internal and external aspect to them. The balance between the two is critical to being a good martial artist. Many arts stress one side or another, but they cannot exist alone. It is the whole Yin/Yang or hard/soft combination that works so well.